The only ones, Aaron Starmer

After setting off from the island where he has been leading a solitary existence, thirteen-year-old Martin discovers a village, Xibalba, peopled with other children who have been living and governing themselves since the grown-ups were all spirited away

After setting off from the island where he has been leading a solitary existence, thirteen-year-old Martin discovers a village, Xibalba, peopled with other children who have been living and governing themselves since the grown-ups were all spirited away